Robert mod



(No Model.)

H. M01). SMITH 85 G. B. ROSE.

STOVE.

NQBILZZZ. Patented Dec, 19, 1893 w @JWL A 4% @Q% M @15- V I W09! WZZZW UNITED STATES ATENT which.

ROBERT MOD. SMITH AND CHARLEY B, ROSE, OF LOUISIANA, MISSOURI.

STOVE.

SPECIFICATION forming part of Letters Patent No. 511,222, dated December 19, 1893. Application filed August 2, 1893. Serial. No. 482,219. (No model.) i

To cd-Z whom it 12mg concern/.-

Be it known that we, ROBERT Mo'D. SMITH and CHARLEY B. ROSE, of the city of Louisi' ana, Pike county, and State of Missouri, have invented certain new and useful Improvements in Sheet-Metal Heating-Stoves, of which the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming a part hereof.

Our invention relates to an improved sheet iron stove, adapted especially for the burning of wood, and it consists in the novel combination, arrangement and construction of the parts hereinafter described and claimed.

In the drawingsz-Figure 1 is a top plan view of a stove embodying our invention. Fig. 2 is a sectional side elevation of same, the section being taken on the line wx of Fig. 1. Fig. 3 is a sectional plan view, the section being taken on line y-y of Fig. 2. Fig. 4 is a detail view, showing the parts of the stove in perspective.

The object of our invention is to provide an improved sheet metal stove, which shall be very light as regards to weight, reasonable in cost, and durable in use.

1 indicates the exterior shell of the stove, which is made of sheet metal and has perpendicular sides, and a draft opening 2 formed in it at a point adjacent its lower end. Said exterior shell conforms to the shape of the stove, which is preferably oblong or elliptical in plan View as herein shown, although it may be circular or rectangular. The lower end of the shell 1 is closed, by means of a permanent head 3 secured thereto by a seamed joint, or other known means. The head is provided with a series of holes or perforations l adjacent its marginal edge, and separated a suit- .p able distance, for a purpose hereinafter men- 6 indicates the upper head of the outer shell, which, unlike the lower head, is not fixed to the shell but is made readily removable or detachable bodily, fora purpose hereinafter mentioned. It is also provided with a series of holes or perforations 4 adjacent its edge and separated a suitable distance, for a purpose made known farther on. It is provided further with a downwardly projecting flange 7 double seamed to said head, so asto fit loosely yet snugly upon the interior of said outer shell during use.

8 represents an inner removableand replaceable shell of sheet metal, having an upper head 9. This removable shell, as shown in Figs. 1 and 3, has about the same general contour as has the outer shell, but it is consider ably smaller, so as to be placed within said outer shell and leave a clear space of about one and one 'half inches between said shells, so that said inner shell will be surrounded by such space, from its upper to its lower end and yet removable bodily from said outer shell.

10 indicates thesurroundingspace. It will be observed that it is continuouspassing uninterruptedly around the vertical walls of the inner shell. A circular draft opening 11 is also formed in the inner vertical wall of said inner shell, at a point directly opposite the draft opening 21 in the outer shell of the stove. Detachably located in ,the aligned draft openings in each of said shells, so as to" be quickly and easily removed, is a short horizontal draft-pipe or box 12. The inner end of this draft pipe should, of course, form an air-tight joint with the inner shell, as near as practicable, so that when it is desired to close off the air supply of the stove, such action may be satisfactorily accomplished. The manner of connecting the said draft pipe to the inner shell may be accomplished in any desired way, which will permit the above function, although we prefer to use the devices now to be described.

13 indicates two vertical straps of sheet metal, located one on each side of the draft opening 11 in the inner shell, so as to form opposite vertical spaces, in which the projecting lug 14 of a rocking bolt 15 may engage, to lock the draft pipe in said opening.

16 indicates two vertical slots, locatedone on each side of the draft opening 2 of the outer shell 1, so as to form opposite slots, in which the outer locking lug 17 of the rocking bolt 15 engages, in lockingand releasing the said draft-pipe during the operation hereinafter mentioned. The outer end of the bolt abuts against an annular projecting bead or rib 18 formed upon the said pipe, and said bolt is thereby held against outward movement. Inward movement of the bolt 15 is prevented by a sheet metal strap 19, secured to the outer surface of said pipe by means of rivets or other proper fastenings. This strap is fastened to form a guide-way for the bolt 15, passing over its body and firmly securing it in place, while permitting it to have a rocking movement in its bearing. However, any other form of a bearing known to be an equivalent for this strap may be used.

We have described but a single strap, but desire to mention that there is a duplicate located on the opposite side of the draft pipe, and, also securing a rocking bolt in place, in a manner identical to that just above described, so thatthere are rocking bolts secured upon the opposite parts of the exterior of the surface of said pipe.

20 indicates a draft cap, telescopically and detachably located upon the outer end of the draft pipe 12. This draft cap has an open inner end and an outer end closed by an imperforate head provided with a suitable handle 21. The construction is such that when said cap is pushed inward, to the limit of its inward movement its inner end will snugly abut against the bead 18 on the draft pipe, and therebyform a tight joint, and prevent the entrance of air to the said pipe and the stove. A series of draft holes 22 is arranged in an annular line in the draft cap 20, at a point adjacent its outer end, so as to be uncovered when said cap is pulled outward, and covered when said cap is pushed inward to itsinward limit.

23 indicates beads rolled in the outer shell, to add stiffness as well as finish to said shell.

They may be added near the top of said shell,

if desired.

Referring again to the upper heads of the shells, it will be noticed that said heads rest closely adjacent to each other, or in other words, the construction is such that when the removable head 6 is in proper position for use of the stove it is imposed in contact with the upper surface of said head of the inner shell. Each upper head has a smoke-pipe opening 2t and a larger opening 25, which latter we designate as the ,fuel opening- The smoke-pipe openings are located adjacent the rear of the stove, while the fuel openings are located adjacent the front thereof. The smoke-pipe opening in the upper removable head registers with the like opening in the underlying head, and the fuel opening in the removable head registers with thelike opening in the underlying head, so that there is a clear passage for the products of combustion from the combustion-chamber upward to the smoke-pipe collars, and so there is free passage for the fuel through both adjacent heads, and for other purposes. A sheet-metal pipecollar 26 has its lower edge seamed, or otherwise secured, to the upper removable head 6, so as to be engaged by the ordinary smoke- A sheet-metal collar 27 has its lower pipe. edge secured to the removable head 6, so as to surround the fuel opening therein.

suitable tight-fitting cover 28 is fitted upon said collar 27; and closes the fuel openlng to the stove, during use. The inner shell 8 1s removably secured in place by means of a transversely-extending bar 29 and screws 30. The bar 29 is of suchlength as to extend across the under side of the head 9 of the inner shell, in contact therewith, and have its ends engage opposite sides of said shell, and thereby also act as a brace to hold the parts of the.

stove in proper shape. To illustrate, suppose a heavy weight of iron, such as a sad-iron,were dropped upon the top of the stove. Said top being thin sheet metal would be disfigured and bent out of presentable appearance, unless it were supported by the transverse bar aforementioned, or by some equivalent device. The screws or bolts 30 are passed through both adjacentlieads 6 and 9, and through the bar 29, binding all three parts securely, yet detachably together. If desired, further fasten ngs for the two adjacent heads may be.pr0v1ded by passing screws, such as 30, through the adjacent and contacting heads 6 and 9, at points at one side of the fuel opening, as shown.

The brace-bar 29 practically rests uponthe inner shell, and the screws or bolts 30 are located so near the wallsthereof that all of the weight is supported by the walls, if the weight be placed upon said bar at any point in its length.

The operation is as follows: Anordinary stove-pipe is to be connected to the smoke-pipe collar 26, and to a suitable source of draft, as a chimney. Fuel is to be placed in the stove through the fuel opening, by removing the cover or lid 28, and draft admitted to the stove by sliding the draft-cap 20- outward upon the draft-pipe or box 12 such a distance as will uncover the holes 22 in saidcapa Air will thereupon enter said holes 22 passto the combustion-chamber and make its exit by way of collar 26, the very thin walls of the inner shell radiating the greatest possible amount of heat, and thereby heating the air contained in the annularspace 10 which surroundssa-id inner shell. This air being heated rises in accordance with the well-known laws controlling the movement of heated gases and passes out of the series of holes 4 in the removable upper head of the outer shell of the stove. As fast as the air makes its exit from the annular space 10 additional supplies of air enter it by way of the series of holes or-open-- ings 4 in the lower head of the outer shell, and so on, producing a constant circulation of all the air in the room in which the stove may be located, and thereby equalizing the temperature of said room atall points.

WVhen the inner shell shall have become burned out, as weanticipate it will in time, owing to the construction of the sheet iron, it

shell.

can be replaced at a very nominal cost, in the manner now to be described, thereby adding to the value and durability of our improved stove.

Of course, the draft-pipe or box 12 must be first removed, as itis secured to the inner Its fastenings must be disengaged. In case other forms of fastenings, than those here shown are used, the description immediately followingwill not apply to them. o have stated that any other known fastening maybe used upon the stove.

The normal position of the bolts .15 is with their lugs 14 and 17 lying in a horizontal position with relation to the other parts. They are shown in such position, with the said lugs engaging the inner and outer shells, thereby locking said draft-pipe or box in its proper place. When it is desired to remove said draft pipe from the stove, the bolts 15 are partially rotated, or rocked or moved in their bearings, toward each other, until the lugs 17 and 1t assume a vertical position. The inner lug 14; will then be withdrawn clear of the fastening-straps 13, and the outer lugs 17 will then stand in alignment with the vertical slots ldformed in the outer shell. Then the draft-pipe may be readily withdrawn. The vertical slots in the outer shell are very small, and will in no wise detract from the appearance of the stove, while, in the estimation of some persons, they may really add to its attractions, as ornaments. The inner shell may now be removed, by first taking out the screws 30, thereby detaching the removable head 6 from the head of the inner shell. The removable head may be detached from the outer shell, as its flange 7 engages the said shell but loosely. A new inner shell may be substituted for the old one, and the parts replaced, as before described. 'After the draft-pipe 12 has-been replaced, it may be secured to both shells of the stove, by rocking or partially rotating the bolts 15 ina direction opposite to that before described, thereby causing the inner logs of said bolts to engage with the vertical straps 13 on the inner shell, and causing the outer lugs 17 to engage the metal of the outer shell, at one side of the vertical slots 16 therein. v

By above described construction we provide an improved air-circulating stove having asingle combustion-chamber of comparatively large size, made of thin sheet metal, and havinga renewable shell replaceable at a small cost.

\Ve are aware that heretofore horizontal sheet metal heating stoves have been constructed with an inner and an outer shell forming an air space between them for the circulation of air therein, and we hereby disclaim such when used alone. In some of the fstoves heretofore constructed with inner and outer shells, saidiuner shell was not continuous.

What we claim is 1. The improved heating-stove, having two upper heads in contact and made of sheetxnetal, asheet-metal shell which supports said heads, said heads having smoke-exit and fuel openings formed therein, a horizontal bracebar 29 arranged beneath and in contact with the inner head and with its ends in contact with said shell, and means for binding said heads and said bar securely together, substantially as specified.

2. In a stove, a draft-pipe secured to the shell by rocking bolts 15 having inner and outer lugs 1e and 17, as specified.

In testimonywhereof we affix our signatures in presence of two witnesses.

ROBERT MOD. SMITH.

CHARLEY B. ROSE. \Vitnesses;

O. B. MAY, J AS. L. STOCKER. 

